:wrench: Add mo files to gitignore

diff --git a/ast b/ast
index 52b19fd5dc4759f5c9217e8ca3e7fd60c8fc7764..14a504250f0bc4f39e0ce9aaceed48cf42d13973 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 52b19fd5dc4759f5c9217e8ca3e7fd60c8fc7764
+Subproject commit 14a504250f0bc4f39e0ce9aaceed48cf42d13973